Improvement in grinders for harvester-knives



PHINEAS W. VAUGHAN, OF DE KALB, ILLINOIS.

IMPROVEMENT IN GRINDERS FOR HARVESTER-KNIVES.

Specification forming part of Letters Patent No. 122,083, dated December 19,1871.

To all whom it may concern:

Be it known that I, PHINEAS W. VAUGHAN, of De Kalb, in the county of De Kalb and State of Illinois, have in vented an Improved Sickle-Grin der, of which the following is a specification:

The present invention relates to an "improvement in that class of grinders which is used to sharpen the knives of sickle-bars; and its nature consists in the use of a horizontal stone which is inclosed at its periphery with a rectangular frame having adjustable end pieces, which are provided with notches to form a suitable rest for holding the knives properly on the stone during the process of grinding them, as the whole is hereinafter fully described and shown.

In the drawing, Figure 1 is a perspective representation of my improved sickle-grinder; Fig. 2, a vertical sectional elevation of the same; Fig. 3, an elevation of one of the adjustable end pieces gletached from the other part of the rectangular rame.

A represents a substantial bed,which is mounted on legs B and supports the mechanism of the grinder, hereinafter described. E represents the stone, which is hung to a vertical shaft, shown by dotted lines S,the lower end of the shaft restin g in a step fixed to the cross-piece c. This shaft S has fastened to it'below the stone E a gearwheel, R, which meshes into a drive-wheel, P, so that when the crank D is turned the shaft W of the wheel P is rotated; consequently the stone in is put in motion. H H represent the side pieces .of a rectangular frame, which are made of wood or other suitable material, and which are provided with slots N N at their ends to receive the tenons a a of the end pieces H and the ends of screw-rods J. The object of putting the tenons a in the slots N is that the ends H may be adjusted to or from the stone E, so that sickles of diiferent patterns may be ground, and the object of the screw-rod is to clamp the frame together. The side piece H is fastened to the end of the bed A and the side to the top of bed but they may be fastened in any other manner most convenient. I I I I I I represent notches formed in the top parts of the side H and ends H, for the purpose of forming rests for the knives of the sickle-bar to bear against when being sharpened.

To use the device the knives, as attached to the sickle-bar, one at a time, are to be placed against the outside of the notched parts I I, while the inner and first edge of the next knife is brought upon the stone, so as to form the proper bevel. This adjustment is readily made-by following the bevel previously formed on the knife. To grind the opposite edge of the tooth, turn the sickle-bar over and bring the knife against the opposite side of the notch. The position of the sickle-bar is shown at Fig. 1.

Having thus described my invention, what I I claim, and desire to secure by Letters Patent, 1s-- 1. The rectangular frame H H H H, made adjustable by means of slots N, tenons a, and rods J, and provided with notches I I, as and for the purpose set forth. 2. The combination of the adjustable frame H H H H, bed A, stone E, and gearing R W, substantially as described and shown.

PHINEAS W. VAUGHAN. YVitnesses:

H. F. SGRIBNER, HIRAM EDDY. 

